FCC unit charge injection device with limited pressure drop

Abstract

The internal wall (13) of the body is provided, between the zones (Z1) (Z2), with at least one chicane (20i) configured so that, in each plane perpendicular to the longitudinal direction of the body containing the said chicane, this chicane extends over just part of the periphery of the internal wall (13).

The invention claimed is: 
     
       1. An injection device configured to atomize a liquid into droplets using a gas, comprising:
 a hollow tubular body extending in a longitudinal direction (X) and of which an internal wall defines a first zone referred to as a contact zone (Z 1 ) and a second zone (Z 2 ) situated downstream of the first zone with respect to a direction in which the liquid and the gas circulate inside the body, the latter having: 
 at least a first and a second inlet opening opening into the said first zone (Z 1 ), so as to respectively inject a liquid and an atomizing gas into the first zone, 
 at least one outlet orifice situated downstream of the first and second zones, for removing the atomized liquid from the body, 
 wherein the internal wall of the body between the contact and the second zone comprises a plurality of chicanes configured so that, in each plane perpendicular to the longitudinal direction of the body containing the plurality of chicanes, wherein the plurality of chicanes extends over at least a quarter of the periphery of the internal wall, wherein the internal wall between the contact zone and the second zone take the form of a straight internal duct. 
 
     
     
       2. The injection device of  claim 1 , characterized in that the internal wall is provided with a plurality of disjointed chicanes. 
     
     
       3. The injection device of  claim 2 , characterized in that each chicane is spaced away from at least one other chicane in the longitudinal direction of the body. 
     
     
       4. The injection device of  claim 2 , characterized in that each chicane is angularly offset from the other chicanes by rotation about an axis parallel to or coincident with the said longitudinal direction (X). 
     
     
       5. The injection device of  claim 4 , characterized in that the orthogonal projection of the chicanes onto a plane perpendicular to the longitudinal direction of the body extends over the entire periphery of the internal wall, with the projections overlapping or juxtaposed. 
     
     
       6. The injection device of  claim 1 , characterized in that the chicanes have a height, measured perpendicular to the longitudinal direction of the body, that is non-zero and equal at most to ½ of the maximum internal dimension of the body perpendicular to the longitudinal direction of the body. 
     
     
       7. The injection device of  claim 1 , characterized in that the plurality of chicanes defines a wall one edge of which is secured to the internal wall along a line extending in a plane perpendicular to the longitudinal direction of the said body. 
     
     
       8. The injection device of  claim 1 , characterized in that the plurality of chicanes define a wall one edge of which is secured to the internal wall along a segment of a curve, notably of a helicoidal curve. 
     
     
       9. The injection device of  claim 1 , characterized in that it comprises a target extending perpendicular to the longitudinal direction of the body, facing a single liquid inlet opening of axis perpendicular to the longitudinal direction (X). 
     
     
       10. The injection device of  claim 1 , characterized in that it comprises two liquid inlet openings extending perpendicular to the longitudinal direction of the body and situated facing one another.